Technology New orbiters for Europe's Galileo satnav system

21:10 22 june 2017

21:10 22 june 2017 Source:
AFP

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With the last eight satellites to be built and tested by OHB, the 10-billion-euro (-billion) constellation will ultimately comprise 30 orbiters . After 17 years and numerous setbacks and budget boosts, Europe ' s Galileo satnav system is due to go live on Thursday with promises of better-than-ever

Europe ' s Galileo satnav system , first approved in 1999, had a difficult birth—taking 17 years and more than triple the original budget to get The commission has already ordered eight more orbiters , for launch in 2017 and 2018, with the last four in the 30-satellite constellation yet to be confirmed.

The European Space Agency signed a contract with a German-British consortium Thursday to build eight more satellites for its Galileo satnav system, an alternative to America's GPS, the agency said Thursday.

The deal was signed at the International Paris Air Show with German company OHB as the prime contractor, and Surrey Satellite Technology Ltd in charge of navigation systems.

The ESA signed on behalf of the European Commission, which owns and funds the system.

"Europe's Galileo navigation constellation will gain an additional eight satellites, bringing it to completion," the ESA said in a statement.

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Europe resumes Galileo satnav deployment (Update). Europe in March will resume satellite launches for its troubled Galileo navigation system , hoping to boost by at least six the number of orbiters this year, Arianespace and the European Commission said Wednesday.

With 18 satellites launched so far, Europe ' s Galileo satnav will be fuzzy at first, boosted by satellites in the US GPS system , until more orbiters are added to the network. Read more. Click here to reset your password. Sign in to get notified via email when new comments are made.

Eighteen Galileo satellites have been placed in Earth's orbit to date, with four more due for launch later this year.

With the last eight satellites to be built and tested by OHB, the 10-billion-euro ($11-billion) constellation will ultimately comprise 30 orbiters.

Twenty-four will be operational, in three orbital planes, with the rest standing by as spares, in orbit and on the ground.

The European Commission expects Galileo to be fully operational by 2020.

The project has experienced many setbacks, including the placement of two satellites in the wrong orbit.

Galileo went live in December last year, providing initial services with a weak signal, having taken 17 years and more than triple the original budget.

The civilian-controlled service is seen as strategically important for Europe, which relies on two military-run rivals -- GPS and Russia's GLONASS.

Serbia to have first gay prime minister

Ana Brnabic will also be the country's first woman prime minister in a sign of increasing tolerance.The president of Serbia has nominated a gay woman to be his prime minister in a double first for the deeply conservative Balkan state.

Europe resumes Galileo satnav deployment (Update). Europe in March will resume satellite launches for its troubled Galileo navigation system , hoping to boost by at least six the number of orbiters this year, Arianespace and the European Commission said Wednesday.

Europe is set to launch the next two satellites Thursday for its multi-billion-euro Galileo satnav system , a rival to America' s GPS, according to space firm Arianespace. Lunar Reconnaissance Orbiter finds new evidence of frost on moon' s surface.

Neither provides a guarantee of uninterrupted service.

In January, ESA said the system suffered another setback, with atomic clocks -- claimed by the agency to be the most accurate ever flown for geolocalisation -- failing onboard a number of satellites in space.

Each Galileo satellite has four ultra-accurate atomic timekeepers, but needs just one working clock.

The failure of nine clocks out of 72 launched so far, has not affected operation, the agency said at the time.

But it would necessitate a relook at clock design, meaning further possible delays.

Thursday's statement said the eight new satellites are based on the approved design for the previous ones, but will feature "improvements based on lessons learnt."

Once fully deployed, Galileo aims to pinpoint a location on Earth to within a metre -- compared to several metres for GPS and GLONASS.

Clients of a paying service can get even more accurate readings -- down to centimetres.

It will also offer search-and-rescue services.

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